修复后台动作预览签名地址过期复用

缓存序列帧换签响应的过期时间并复用统一安全窗口
临近过期时自动换签并保持已就绪帧可见
补充跨五分钟回绕播放与缓存边界回归测试
同步后台素材预览架构约束修复 migration blocker。
This commit is contained in:
2026-08-05 19:22:39 +08:00
parent c76d0a8835
commit 731bc02b5c
7 changed files with 268 additions and 50 deletions
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